Allobates juami Simões, Gagliardi-Urrutia, Rojas-Runjaic & Castroviejo-Fisher, 2018
|Species Description: Simões PI, Gagliardi-Urrutia G, Rojas-Runjac FJM, Castroviejo-Fisher S. 2018. A new species of nurse-frog (Aromobatide, Allobates) from the Juami River basin, northwestern Brazilian Amazonia. Zootaxa 4387: 109–133.|
This species differs from other species of nurse frogs because the males lack dark pigments on their ventral side. Their dorsal color pattern is mainly a dark brown color with a light brown snout, they have light-colored dorsolateral and ventrolateral stripes on the body, they have a light-colored paracloacal blemish, no presence of melanophores on the chin area, and the snout-vent length is different from other nurse frog species. Allobates juami also emits advertisement calls as trills that are composed of a larger number of notes compared to those of other nurse frog species. Allobates juami and Allobates conspicuus may be easily mistaken for one another but the upper backside of A. conspicuus is a much lighter brown color than A. juami. Allobates conspicuus also has dermal fringes on its toes, which A. juami does not have. Compared to other Allobates species, A. juami emits calls that are composed of longer numbers of notes. More comprehensive diagnosis can be found in Simoes et al. 2018.
This species exhibits cryptic external coloration. In preservative, the dorsal part of the body is a solid dark brown color. The anterior part of the body is light brown in color starting from the snout tip to the eye. The posterior part of the body is also light brown around the urostyle area. A light pale stripe is found on the dorsolateral region of this frog. There is a dark brown stripe present on the sides of the body that starts from the snout tip and ends at the groin. Under the dark brown stripe is a very narrow white stripe that starts from the eye and ends at the groin. The ventrum is white to translucent with a narrow, pale ventrolateral strip and a scattering of iridescent patches over the chin and between the pectoral region and posterior abdomen (Simoes et al. 2018).
In life, the dorsum is similar in coloration as in preservative. The ventral side of the body is yellow in color and merges with the narrow, iridescent white stripe ventrolateral strip. The abdomen is significantly paler in color. The throat coloration varies depending on the sex. In females, the throat is mainly yellow. In males, the throat can be pink or semitransparent in color. The dorsal part of the arm is light brown and may have very tiny spotting marks. There is a light pale paracloacal blemish that blends in with the light brown color present on the thigh. The scutes present on the toe discs can either be white or black. The eyes have a dark iris and golden ring around the pupils. More comprehensive coloration can be found in Simoes et al. 2018.
Most of the variation comes from the throat color between the males and females. While females have a yellow throat, males have a pink to semitransparent colored throat (Simoes et al. 2018).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Brazil
Life History, Abundance, Activity, and Special Behaviors
This species is diurnal meaning that the males do their vocalization calls during the day. The calls consist of short notes composed of trills that last about 2.5 to 5.0 seconds. Each trill containing about 65 notes that last about 0.03 seconds. Their average pace of note emissions are about 13 notes per second. The notes of the calls have an ascending frequency with each peak frequency being about 5.0 kHz. The intervals of silence between each note in the trills lasts about 0.03 seconds on average (Simoes et al. 2018).
Trends and Threats
Based on neighbor joining analyses on 16S rDNA, A. juami is more closely related to A. insperatus. Together they are sister to the clade composed of A. conspicuus and A. subfolionidificans (Simoes et al. 2018).
The species epithet, “juami”, refers to the locality of where the species was found, the Juami River (Simoes et al. 2018).
This species is the 27th Allobates species to be reported in Brazil (Simoes et al. 2018).
Simoes, P. Gagliardi-Urruta, G., Rojas-Runjaic, F.J.M., Castroviejo-Fisher, S. (2018). "A new species of nurse-frog (Aromobatidae, Allobates) from the Juami River basin, northwestern Brazilian Amazonia." Zootaxa, 4387(1), 109-133. [link]
Originally submitted by: Gabriela Do Nascimento (2021-04-12)
Description by: Gabriela Do Nascimento, Ann T. Chang (updated 2021-04-12)
Distribution by: Gabriela Do Nascimento (updated 2021-04-12)
Life history by: Gabriela Do Nascimento (updated 2021-04-12)
Trends and threats by: Gabriela Do Nascimento (updated 2021-04-12)
Comments by: Ann T. Chang, Gabriela Do Nascimento, Michelle S. Koo (updated 2021-04-21)
Edited by: Ann T. Chang (2021-04-21)
Species Account Citation: AmphibiaWeb 2021 Allobates juami: Nurse Frog <https://amphibiaweb.org/species/8785> University of California, Berkeley, CA, USA. Accessed Jun 2, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 2 Jun 2023.
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